package com.yinxin.thread;

import com.yinxin.util.ThreadUtil;

import java.util.List;

//死锁:多个线程互相抱着对方需要的资源,形成僵持
public class DeadLock {

    public static void main(String[] args) {

        Makeup test1 = new Makeup(1, "人1");
        Makeup test2 = new Makeup(0, "人0");

        test1.start();
        test2.start();
    }

}

//口红
class Lipstick {

}

//镜子
class Mirror {

}

class Makeup extends Thread {

    //需要的资源只有一份,用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice;//选择
    String girlName;//使用化妆品的人

    Makeup(int choice, String girlName) {
        this.choice = choice;
        this.girlName = girlName;
    }

    @Override
    public void run() {
        //化妆
        makeup();
    }

    //化妆,互相持有对方的锁,拿到对方的资源
    private void makeup() {
        if (choice == 0) {
            //choice 0
            synchronized (lipstick) {//获得口红的锁
                System.out.println(this.girlName + "获取口红的锁");
                ThreadUtil.sleep(1000);
//                synchronized (mirror) {//一秒钟后获得镜子的锁
//                    System.out.println(this.girlName + "获得镜子的锁");
//                }
                //会造成死锁
            }
            synchronized (mirror) {//一秒钟后获得镜子的锁
                System.out.println(this.girlName + "获得镜子的锁");
            }
            //解决死锁
        } else {
            //choice 1
            synchronized (mirror) {//获得镜子的锁
                System.out.println(this.girlName + "获得镜子的锁");
                ThreadUtil.sleep(2000);
                synchronized (lipstick) {//获得口红的锁
                    System.out.println(this.girlName + "获得口红的锁");
                }
            }
        }
    }
}